| CPC H04W 12/037 (2021.01) | 20 Claims |

|
1. A first node for wireless communications, comprising: a first transmitter, performing a first transmission on a first Service Data Unit (SDU); the action of performing a first transmission on the first SDU includes transmitting a first Media Access Control (MAC) Protocol Data Unit (PDU) group; the first MAC PDU group at least comprises a first MAC PDU; a first receiver, receiving a first signaling and a first status report, the first signaling being used to indicate that a first identifier (ID) is renewed as a second ID; the first status report is used to indicate that the first SDU is not received yet; and the first transmitter, performing a second transmission on the first SDU; the action of performing a second transmission on the first SDU includes transmitting a second MAC PDU group; the second MAC PDU group at least comprises a second MAC PDU; wherein the first signaling is used to trigger the first status report, and the first ID and the second ID are link layer IDs, respectively; the first MAC PDU group carries the first SDU; the first MAC PDU group comprises at least part of bits comprised in the first ID; and the second MAC PDU group carries the first SDU; the second MAC PDU group comprises at least part of bits comprised in the second ID.
|